sorry,but I don't understand word problems - like what formula/expression to use. Here's the 1st problem: Rob practiced 3/5 of his music in 25minutes. About how long does it take to practice all of his music?

I know that Rob has 2/5 left of music to practice. So, do I multiply 2/5 by 25minutes?

Here's the 2nd problem: Jared vowed to walk 100miles a month. If he can walk 1/2mile in 20minutes, how many minutes will it take him to walk 100miles?

In this case, do i multiply 100 by 1/2, then multiply by 20minutes?

For the first problem, you are correct in understanding that Rob has 2/5 of his music left to practice. To find out how long it takes to practice all of his music, you need to determine the time it takes for 1/5 of his music and then multiply that time by 5.

Since Rob practiced 3/5 of his music in 25 minutes, you can divide 25 by 3 to find out how long it takes for 1/5 of his music: 25 / 3 = 8.33 minutes (approximately).

Now, you can multiply 8.33 minutes by 5 to get the total time it takes to practice all of his music: 8.33 * 5 = 41.65 minutes (approximately).

So, it will take Rob approximately 41.65 minutes to practice all of his music.

For the second problem, you are partially correct. To find out how long it will take Jared to walk 100 miles, you need to multiply 100 miles by the time it takes him to walk 1 mile, which is given as 1/2 mile in 20 minutes.

So, you can multiply 100 miles by 1/2 mile and then multiply that by 20 minutes: 100 * (1/2) * 20 = 1000 minutes.

Therefore, it will take Jared approximately 1000 minutes to walk 100 miles.